NBS frequency and time broadcast services
Subtitle: radio stations WWV, WWVH, WWVB, WWVL.
Publisher: U.S. Govt. Print. Off.
Published: 1968
Place of publication: Washington, D.C
Language: eng
Number of pages: 14
Subjects: Time-signals; Radio -- Transmitters and transmission
Notes: "Supersedes NBS Miscellaneous publication 236, 1967 edition."

Bibliographical footnotes.